Twilio app setup

gistfile1.js

var twilio_app = cli.account.getApplication(process.env.app_sid, function (err, app) {
  if (err) {
    throw err;
  }
  app.register();
  app.on('incomingCall', function (call) {
    if (arduinoTcp === null) {
      call.say("I can't do that for you, Hal. I'm offline.");
    } else {
      curr_call = call;
      call.gather(getDigits, {numDigits: 1}).say("Use 2, 4, 6, and 8 to drive. Press 0 to stop, 5 for distance.");
    }
  });
});